title: The computation of lipophilicities of ⁶⁴Cu PET systems based on a novel approach for fluctuating charges.
abstract: A QSPR scheme for the computation of lipophilicities of ⁶⁴Cu complexes was developed with a training set of 24 tetraazamacrocylic and bispidine-based Cu(II) compounds and their experimentally available 1-octanol-water distribution coefficients. A minimum number of physically meaningful parameters were used in the scheme, and these are primarily based on data available from molecular mechanics calculations, using an established force field for Cu(II) complexes and a recently developed scheme for the calculation of fluctuating atomic charges. The developed model was also applied to an independent validation set and was found to accurately predict distribution coefficients of potential ⁶⁴Cu PET (positron emission tomography) systems. A possible next step would be the development of a QSAR-based biodistribution model to track the uptake of imaging agents in different organs and tissues of the body. It is expected that such simple, empirical models of lipophilicity and biodistribution will be very useful in the design and virtual screening of positron emission tomography (PET) imaging agents.
authors.affiliation: Universität Heidelberg, Anorganisch-Chemisches Institut, INF 270, D-69120 Heidelberg, Germany. peter.comba@aci.uni-heidelberg.de
authors.forename: Peter
authors.initials: P
authors.lastname: Comba
authors.forename: Bodo
authors.initials: B
authors.lastname: Martin
authors.forename: Avik
authors.initials: A
authors.lastname: Sanyal
authors.forename: Holger
authors.initials: H
authors.lastname: Stephan
mesh_terms: D020003:1-Octanol / Q000737:chemistry; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry; D003301:Copper Radioisotopes / Q000737:chemistry; D049268:Positron-Emission Tomography; D021281:Quantitative Structure-Activity Relationship; D019275:Radiopharmaceuticals / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D019086:Bridged Bicyclo Compounds, Heterocyclic; D056831:Coordination Complexes; D003301:Copper Radioisotopes; D019275:Radiopharmaceuticals; C495809:bispidine; D014867:Water; D020003:1-Octanol